Malicious PDF — malware analysis report

Static analysis result for SHA-256 742fa779d673cea7…

MALICIOUS

PDF

62.2 KB Created: 2020-10-16 09:44:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 9b28c1005b88b880110bbcf05aa1b3a3 SHA-1: c94bfc58ba6e0caeb9c63b60bd5f6f27f4a086b6 SHA-256: 742fa779d673cea7ad33fbc2b179838d69ee17cf6464916174c3065adff677ad
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a link farm designed to redirect users to malicious infrastructure, specifically identified by the URL 'https://cctraff.ru/123?keyword=lexicon+ethics+pdf+latest+edition'. The document body, though heavily obfuscated, contains text suggesting a lure related to "lexicon ethics pdf latest edition". The presence of numerous external links and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://cctraff.ru/123?keyword=lexicon+ethics+pdf+latest+edition In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366009/normal_5f876d7949081.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365575/normal_5f88887f1d2fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366973/normal_5f878127d54f1.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/tifuxasorelav-sunagutigu-gikisifexixabot.pdfIn PDF document text
    • https://vuzevarezevarot.weebly.com/uploads/1/3/0/7/130740461/6028b1.pdfIn PDF document text
    • https://nakumupapetiz.weebly.com/uploads/1/3/2/7/132741615/559e6419.pdfIn PDF document text
    • https://pejopazuzaguwoz.weebly.com/uploads/1/3/2/8/132815183/vukajuxeravetiwaze.pdfIn PDF document text
    • https://vupimolafi.weebly.com/uploads/1/3/1/3/131398504/wafera.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/wijigomofiweb_lotitosede_jukis_dirum.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/8709547.pdfIn PDF document text
    • https://gidixelasulam.weebly.com/uploads/1/3/0/7/130739099/jowuzerijuzavubotemo.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/ligewajinaxi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/893f249c-58cb-4483-adbe-2f5ebd57a76e/ludab.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a4430dd1-381a-469e-9b60-587740927b1f/lutokop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1019771b-4b5f-4253-ba57-a4f07c849eb0/97942943747.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d43ac2d0-3d18-43f5-936c-6331fe80d554/mexopalawavojapewatofogem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/54ac46a1-77fc-4050-baf9-5e99db904845/64754080036.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2574/3521/files/is_benzoic_acid_more_polar_than_benzyl_alcohol.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3712/5529/files/death_row_stories_cnn_kevin_cooper.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/5274/7937/files/33940737138.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2795/4854/files/18830936912.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/2651/3557/files/56025596519.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/7400/2327/files/questions_without_auxiliaries_worksheets.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000aa3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA3C 4944 bytes
SHA-256: 09095f7884bb97543c97b911454d57d3dabf09cd2f91cca93c8ec4cba474a7a5
font_01_sfnt_off0000bb01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBB01 9908 bytes
SHA-256: 4c276c467df94e5d69426cf0568013b9895e8882d6ad9ae154a9261bfc0c174b
font_02_sfnt_off0000dcd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD9 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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